So the trick is to get your AGI stat up for a couple of extra iframes at the far end (100 and upwards?). Also, I just only realized that carry weight is incremental and not locked to 3 different speeds like in Dark Souls. That is, you run marginally faster and roll a little bit faster even when wearing only 1% less than before, so it's in your interest to weigh as little as possible.
At least now I have a good reason to wear light armors again. That Llewellyn armor is stylin'.